JP4006712B2 - File management apparatus and file management method - Google Patents

Description

  The present invention relates to a file management apparatus and a file management method, and is suitable for application to, for example, a video disk recorder.

  Conventionally, in a video disk recorder, a video signal and an audio signal to be recorded supplied from the outside are filed and recorded on an optical disk, while the video signal and audio signal recorded on the optical disk are recorded as needed. It is designed to be replayable.

  Incidentally, as shown in FIG. 5, an optical disk used in a video disk recorder usually has a spiral track 2 formed on a recording surface 1A, and the track is divided into a plurality of sectors 3 of a predetermined unit. Yes.

  In this case, in the video disk recorder, if a plurality of continuous sectors 3 capable of recording all of the filed video signals and audio signals can be secured in the optical disk, the video signals and audio signals over the continuous sectors 3 can be secured. Record the signal.

  Also, in this video disk recorder, when it is difficult to secure a plurality of continuous sectors 3 that can record all of the filed video signals and audio signals on the optical disk, as shown in FIG. 6, the video signals and audio signals are recorded. The signal is divided into lengths corresponding to the empty sector 3A where no signal is recorded at an interval, and this divided signal (hereinafter referred to as an allocation extent (AE) signal). ) 5A to 5C are recorded in the corresponding empty sector 3A.

  For this reason, in this video disk recorder, video signals and audio signals recorded on an optical disk are managed as files by a file system which is one of the mechanisms of an operating system (OS).

  By the way, in the video disk recorder having such a configuration, the file system is defined so that only the head position of the sector can be specified on the optical disk. For this reason, for example, the video signal and audio signal which are filed on the optical disk and all the allo- grams are specified. When recording the case extent signals 5A to 5C, the head positions of these are always matched with the head position of the sector 3.

  However, under the definition of such a file system, for example, when dividing or combining a video signal and an audio signal or allocation extent signals 5A to 5C at an arbitrary position, the division target or the combination target The video signal and audio signal or the allocation extent signals 5A to 5C are newly recorded on the optical disk, and the part to be divided or the other signal to be combined must be newly filed. Since it takes a relatively long time to secure a recording area by re-file and to re-record, there has been a problem that the editing processing of these division and combination becomes complicated.

  Further, in this video disk recorder, it is considered that the size of each sector 3 of the optical disk is increased in accordance with the recent demand for high-density recording. When a video signal and an audio signal having a relatively short file length are recorded, the area in which the video signal and the audio signal in the sector 3 are not recorded remains, and the sector 3 is wasted. .

  By the way, as a method for solving such a problem, the file system of this video disk recorder is replaced with the above-described file system, another file system using an operating system, or, for example, hierarchical file management disclosed in Japanese Patent Laid-Open No. 63-116232 Although it is conceivable to apply the method, these file systems and file management methods are defined in the same manner as the above-described file system, and thus there is a problem that it is difficult to easily solve the above-described problem.

  The present invention has been made in consideration of the above points, and intends to realize a file management apparatus and a file management method that can greatly simplify the editing process.

  In order to solve such a problem, in the present invention, file management information recorded on a recording medium is composed of a file management table composed of a plurality of file records and an allocation extent table composed of a plurality of allocation extent records. The file record is composed of an attribute information storage unit for storing the attribute information of the file of the recording signal, and a pointer storage unit for storing a pointer of the corresponding allocation extent record in the allocation extent table. The allocation extent record is actually recorded from the start sector address indicating the address of the recording start sector as a recording position on the recording medium of a plurality of allocation extent signals divided from the recording signal, and from the head in the recording start sector. Allo -Start byte offset value indicating the position to start recording of the extent extent signal, end sector address indicating the address of the recording end sector, and actual allocation extent signal recording from the beginning in the recording end sector It consists of an address information storage unit that stores an end byte offset value that represents the position to be recorded, and a pointer storage unit that stores pointers of other corresponding allocation extent records, and consists of a plurality of sectors of the recording medium. A recording signal composed of a plurality of allocation extent signals to be recorded in the recording area is filed and managed based on file management information, and the recording signal is divided into a plurality of allocation extent signals and recorded on the recording medium. When allocating, the allocation execution to divide from the recorded signal Specify the recording position in the recording medium for each tent signal in units of arbitrary bytes in the sector, and file the recording signal, and store the recording position in the allocation extent table recorded on the recording medium. During the file splitting process, the allocation extent record of the allocation extent signal to be split is searched from the allocation extent table, and the portion after the split position of the allocation extent signal to be split is supported. The start sector address and the start byte offset value to be calculated are created, a new allocation extent record is created in the allocation extent table, and the address information storage section of the new allocation extent record is moved to the location after the division position. The start cell corresponding to the part And the end sector address and end byte offset value stored in the searched allocation extent record are copied and stored in the searched allocation extent record. The stored end sector address and end byte offset value are changed to the new end sector address and end byte offset value corresponding to the previous part from the division position of the allocation extent signal to be divided, and the search is performed. The allocation extent record pointer is changed to end information, the attribute information stored in the file record corresponding to the file of the recording signal to be divided is converted, and the new allocation extent record is also supported. New file Create a code, the relative new file records so as to store the attribute information of the file of the divided object and to perform the dividing processing of the file of the recording signal is specified in bytes.

  As a result, even in an editing process in which a filed recording signal is divided at an arbitrary position, it is not necessary to re-record on the recording medium so that only the editing target portion of the recording signal is filed, and only on the file management information. Can be divided.

  According to the present invention, the file management information recorded on the recording medium is composed of a file management table composed of a plurality of file records and an allocation extent table composed of a plurality of allocation extent records. Is composed of an attribute information storage section for storing attribute information of a file of a recording signal and a pointer storage section for storing a pointer of a corresponding allocation extent record in the allocation extent table, and an allocation extent record A start sector address indicating the address of the recording start sector as a recording position in the recording medium of a plurality of allocation extent signals divided from the recording signal, and an allocation extent signal from the head in the recording start sector. Start byte offset value that indicates the position to start recording, end sector address that indicates the address of the recording end sector, and the position from the beginning in the recording end sector to the position where the recording of the allocation extent signal actually ends An address information storage unit for storing an end byte offset value and a pointer storage unit for storing a pointer of another corresponding allocation extent record are recorded in a recording area composed of a plurality of sectors on a recording medium. When a recording signal consisting of a plurality of allocation extent signals is filed and managed based on the file management information, the recording signal is divided into a plurality of allocation extent signals and recorded. Recording media for each allocation extent signal divided from the signal The recording position is specified in arbitrary byte units within the sector and the recording signal is filed, and the recording position is stored in the allocation extent table recorded on the recording medium, and the recording signal file is divided. The allocation extent record of the allocation extent signal to be divided is searched from the allocation extent table, and the start sector address and the start corresponding to the portion after the division position of the allocation extent signal to be divided are searched. The byte offset value is obtained, a new allocation extent record is created in the allocation extent table, and the address information storage section of the new allocation extent record is the start sector corresponding to the portion after the division position. Address and start byte Stores the offset value, and stores the end sector address and end byte offset value stored in the searched allocation extent record so as to be copied, and the end sector stored in the searched allocation extent record. The address and end byte offset value are changed to the new end sector address and end byte offset value corresponding to the previous part from the division position of the allocation extent signal to be divided, and the retrieved allocation extent record Is changed to end information, attribute information stored in the file record corresponding to the file of the recording signal to be divided is converted, and a new file record is created corresponding to the new allocation extent record. And the new The attribute information of the file to be divided is stored in the file record, and the file division processing of the recording signal is performed by specifying in units of bytes, so that the filed recording signal is divided at an arbitrary position. Even in such an editing process, it is not necessary to re-record on the recording medium so that only the part to be edited of the recording signal is made into a file, and it can be divided only on the file management information. A file management apparatus and a file management method that can be simplified can be realized.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Configuration of Video Disc Recorder According to this Embodiment In FIG. 1, reference numeral 10 denotes a video disc recorder to which the present invention is applied as a whole. In the recording mode, an operator can specify the designation input unit 11 having a personal computer configuration, for example. When a file name or the like for the recording start video signal S1 and audio signal S2 is designated and input via the key input unit 11A, the system control unit 12 receives this and controls the entire video disk recorder 10.

  In this state, in this video disk recorder 10, the video signal S1 is supplied from the outside to the first encoder / decoder unit 14A of the input / output processing unit 13, and the audio signal S2 is supplied to the second encoder / decoder unit 14B. Supplied.

  The first or second encoder / decoder unit 14A or 14B encodes the corresponding video signal S1 or audio signal S2 by a predetermined method, and multiplex / decodes the obtained video encoded signal S3 or audio encoded signal S4, respectively. The data is sent to the multiplex unit 15.

  The multiplex / demultiplex unit 15 multiplexes the video encoded signal S3 and the audio encoded signal S4 to convert it into a single multiplexed signal S5, which is converted via the buffer circuit unit 17 of the drive unit 16. Send to ECC (Error Correction Code) circuit section 18.

  The multiplexed signal S5 given to the ECC circuit unit 18 is added with an error correction code, modulated by a predetermined method via the modulation / demodulation circuit unit 19, and supplied to the pickup unit 20 as a recording signal S6.

  Under the control of the file management unit 21, the pickup unit 20 records the recording signal S6 in an empty area composed of sectors (not shown) in which signals of the optical disk 22 are not recorded. File management information for managing a file having a file name or the like corresponding to the recording signal S6 is recorded in a predetermined area.

  Thus, in this video disk recorder 10, the video signal S1 and the audio signal S2 can be filed and recorded on the optical disk 22.

  On the other hand, in the video disk recorder 10, when the operator designates and inputs a file name for the video signal S1 and audio signal S2 to be reproduced and to be reproduced via the key input unit 11A of the designation input unit 11 in the reproduction mode, The unit 12 receives this and controls the entire video disk recorder 10.

  In this state, the pick-up unit 20 reproduces the file management information recorded in a predetermined area of the optical disk 22 under the control of the file management unit 21, and corresponds to the file name designated based on the reproduction result. The recording signal S6 to be reproduced is reproduced and sent to the modulation / demodulation circuit unit 19.

  The modulation / demodulation circuit unit 19 demodulates the recording signal S6 by a predetermined method and sends it to the ECC circuit unit 18 as a demodulated signal S7. The ECC circuit unit 18 also adds an error added to the demodulated signal S7. After the demodulated signal S7 is error-corrected based on the correction code, it is sent as a multiplexed signal S8 to the multiplex / demultiplex unit 15 via the buffer circuit unit 17.

  The multiplex / demultiplex unit 15 separates the video encoded signal S9 and the audio encoded signal D10 from the multiplexed signal S8 and sends them to the corresponding first or second encoder / decoder unit 14A or 14B, respectively. To do.

  Then, the first or second encoder / decoder unit 14A or 14B decodes the corresponding video encoded signal S9 or audio encoded signal S10 by a predetermined method, respectively, and outputs the obtained video signal S11 or audio signal S12 to the outside. Are sent to a monitor (not shown).

  In this video disk recorder 10, when the optical disk 22 is loaded prior to signal recording / reproduction, the file management unit 21 uses the optical disk 20 to record the file management information already recorded on the optical disk 20. , And a free area of the optical disk 22 is detected based on the reproduction result, and the detection result is written in a recording medium (not shown) such as a semiconductor memory provided therein.

  As a result, the file management unit 21 manages the optical disk 22 based on the information on the free area recorded on the internal recording medium.

  In addition, every time the recording signal S6 is recorded on the optical disk 22 in the recording mode, the file management unit 21 detects an empty area of the optical disk 22 based on the file management information corresponding to the recording signal S6. An internal recording medium is overwritten, and in this way, a free area of the optical disk 22 can be always recognized.

  The designation input unit 11 displays a file name or the like on the display unit 11B when the operator designates and inputs a file name or the like via the key input unit 11A in the recording mode and the reproduction mode. It is possible to confirm whether or not etc. are correctly specified.

(2) File management of optical disk In addition to this configuration, in this video disk recorder 10, as shown in FIG. 2, the recording signal S6 is recorded on the optical disk 22 by being divided into a plurality of allocation extent signals S6A to S6C. Therefore, the file management information recorded in a predetermined area of the optical disk 22 includes a file management table 26 including a plurality of file records 25, and a plurality of allocation extent records (hereinafter referred to as AE records). An allocation extent table 28 (hereinafter referred to as an AE table) 28.

  Each file record 25 of the file management table 26 includes an attribute information storage unit 25A for storing attribute information such as a file name, a file creation date and time, a file data length, and a corresponding AE record 27 in the AE table 28. A pointer storage unit 25B for storing address information (hereinafter referred to as a pointer) is provided.

  The AE record 27 of the AE table 28 includes an address information storage unit 27A that stores address information of one allocation extent signal S6A to S6C or the like, and a pointer to the corresponding AE record 27A in the AE table 28. Is stored in the pointer storage unit 27B.

  In this case, the video disk recorder 10 records the allocation extent signals S6A to S6C constituting the file in the optical disk 22 from the position of any byte unit in the sector under the management of the file management unit 21. It is designed to get you started. Incidentally, even when the recording signal S6 is continuously recorded, it can be recorded in the same manner.

Therefore, as shown in FIG. 2 and FIG. 3, the address information storage unit 27A of the AE record 27 is a continuous single used for recording one allocation extent signal S6A to S6C or S6C on the optical disk 22. Or, among a plurality of sectors, the address information of the head sector 30A (hereinafter referred to as the start sector address) and the address information of the tail sector 30B (hereinafter referred to as the end sector address) and the head In the sector 30A, an offset value indicating from the head of the sector 30A to the byte position where the one allocation extent signal S6A to S6C is actually recorded (hereinafter referred to as a start byte offset value). In O ₁ and the last sector 30B, the recording signal S6 is recorded from the head of the sector 30B. An offset value (hereinafter referred to as an end byte offset value) O ₂ representing the byte position at which recording ends is stored.

  Incidentally, the address information storage unit 27A can also store attribute information of one corresponding allocation extent signal S6A to S6C as needed.

In this manner, in this video disk recorder 10, in the recording mode, the file management unit 21 has attribute information, pointer, start sector address K ₁ , end sector address K ₂ , start byte corresponding to the file to be recorded on the optical disk 22. By giving the offset value O ₁ and the end byte offset value O ₂ to the pickup unit 20, the attribute information is stored in the file record 25 of the file management table 26 of the optical disk 22 through the pickup unit 20. among the allocating Chillon extent signal S6A～S6C, stores a pointer that indicates the position of the AE record 27 to store the starting sector address K ₁ or the like corresponding to the first allo recorded cases Chillon extent signal S6A.

And the AE record 27 that stores the starting sector address K ₁ or the like corresponding to the allocating Chillon extents signal S6A that this is first recorded, the first with the start sector address K ₁ or the like of the first allocating Chillon extents signal S6A stores of allocating Chillon pointer to the location of allocating Chillon extent signal AE records 27 to store the starting sector address K ₁ or the like corresponding to the S6B to subsequently recorded in extents signal S6A, further the AE record 27 corresponding allocating Chillon extents signal S6B the starting sector address K ₁ like allocating Chillon extents signal S6B followed by the AE record 27 to store the starting sector address K ₁ or the like corresponding to the allocating Chillon extents signal S6C to be recorded with position To store a pointer to.

The file management unit 21 in this way is to store the corresponding pointer sequentially with each allocating Chillon extents signal S6A~S6C the starting sector address K ₁ or the like to each AE record 27 of the AE table 28, the allocating Chillon extent among the signals S6A～S6C, the AE record 27 corresponding to the allocating Chillon extents signal S6C that is last recorded, corresponding with the start sector address K ₁ or the like corresponding to the allocating Chillon extents signal S6C recorded in this last to other store to a predetermined symbol indicating that there is no starting sector address K ₁ or the like to the like (hereinafter, referred to as end information this) to store.

  Therefore, the file management unit 21 records the recording signal S6 on the optical disk 22 even when the recording signal S6 is divided into a plurality of allocation extent signals S6A to S6C and recorded on the optical disk 22. The file management table 26 is reproduced, and the AE table 28 is reproduced on the basis of the reproduction result, whereby each of the allocation extent signals S6A to S6C constituting the file according to the pointer stored in each AE record 27. The address information can be obtained according to the order in which the address information is to be sequentially reproduced, so that each of the allocation extent signals S6A to S6C can be correctly reproduced.

  Thus, in this video disk recorder 10, in the recording mode, the file management unit 21 makes the recording signal S6 into a file by designating the recording start position and recording end position in the optical disk 22 in units of bytes of the sector of the optical disk 22. By storing the recording start position and recording end position designated at this time in the AE table 28 recorded on the optical disk 22, the recording signal S6 can be filed and managed in units of bytes.

  The video disk recorder 10 sequentially reproduces the file management table 26 and the AE table 28 recorded on the optical disk 22 in the reproduction mode, and based on the reproduction result, the recording signal S6 of the file requested for reproduction. Can be reproduced from the optical disk 22.

  As described above, in the video disk recorder 10, the file management unit 21 can file and specify the recording start position and the recording end position of the recording signal S6 in units of bytes. The join process can also be specified in byte units.

  That is, first, when the operator designates and inputs a division process via the key input unit 11A of the designation input unit 11 in the edit processing mode, the file management unit 21 starts the division processing procedure RT1 shown in FIG. 4 at step SP1 and continues. Proceeding to step SP2, when the operator designates the file name of the file to be divided, for example, via the key input unit 11A of the designation input unit 11 at this step SP2, the recording signal S6 corresponding to the file name is sent from the optical disk 22. Let it play.

  As a result, the video disk recorder 10 obtains the video signal S11 and the audio signal S12 from the recording signal S6 reproduced from the optical disk 22, and sends them to a monitor and a speaker, whereby an image based on the video signal S11 is displayed on the monitor. While displaying with a time code, the audio | voice based on the audio signal S12 is output from a speaker.

  In this state, when the operator designates and inputs a time code corresponding to the position to be divided via the key input unit 11A of the designation input unit 11, the file management unit 21 specifies the file name and the time code previously designated and input. The file management table 26 recorded in the optical disk 22 and the AE record 27 in the AE table 28 corresponding to the file management table 26 are sequentially searched, and the allocation extent signals S6A to S6A to have the division target position of the file to be divided. Alternatively, the AE record 27 corresponding to S6C is found, and the number of bytes from the head of the sector is determined from various information in the address information storage unit 27A of the found AE record 27.

Then, the file management unit 21 divides the allocation extent signal S6A to be divided based on various information in the address information storage unit 27A of the found AE record 27 and the division target position obtained in units of sectors, or Start sector address K ₁ (sector where the division target position is located) corresponding to a portion after the division position of S6C (including the division position), start byte offset value O ₁ , end sector address K ₂ and end byte off A set value O ₂ is obtained.

Then file management unit 21 proceeds to step SP3 to create a new AE record 27, the address information storing section 27A of the AE record 27 starts determined in step SP2 sector address _{K 1} and the start byte offset excisional value _{O 1} Is stored.

File management unit 21 subsequently proceeds to step SP4, the above-mentioned step ending sector addresses stored to the AE record 27 K ₂ and end byte offset excisional value O ₂ a new AE record Sagashiate in SP2 27 To be copied and stored. If necessary, the attribute information of the AE record 27 is copied or newly stored.

Then file management unit 21 proceeds to step SP5, allocating Chillon extents signals the completion is stored in the AE record 27 sector address K ₂ and end byte offset excisional value O ₂ which Sagashiate in step SP2 described above division target S6A ~, or with changing to the new ending sector address K ₂ and end byte offset excisional value O ₂ corresponding to the previous portion from the dividing-target position of S6C, changing the pointers of the AE record 27 to the end information. Further, the attribute information of the AE record 27 is changed as necessary.

  Subsequently, the file management unit 21 proceeds to step SP6, and converts attribute information such as a file name and a file data length stored in the file record 25 corresponding to the file to be divided.

  Then, the file management unit 21 proceeds to the next step SP7 to create a new file record 25 corresponding to the new AE record 27, to which attribute information such as the file name of the file to be divided and the data length of the file is stored. Then, the process proceeds to step SP8, and this division processing procedure RT1 is completed.

  As a result, when the file name of the file to be divided later is designated, the new file record 25 and the AE record 27 are sequentially reproduced in accordance with the file name, thereby corresponding to the portion after the division target position of the file to be divided. The allocation extent signals S6A to S6C to be reproduced can be reproduced.

  On the other hand, when the operator designates and inputs the joining process via the key input unit 11A of the designation input unit 11 in the edit processing mode, the file management unit 21 starts the joining process procedure RT2 shown in FIG. Proceeding to SP11, in this step SP11, the operator designates the file names of two files to be combined (that is, the front part and the rear part) via the key input part 11A of the designation input part 11, whereby the optical disk 22 is designated. Then, the file management table 26 and the AE table 28 corresponding to these file names are reproduced.

  Then, based on the reproduction result, the file management unit 21 corresponds to the last recorded allocation extent signal S6C among the allocation extent signals S6A to S6C corresponding to the file that becomes the front part after the combination. AE record 27 is detected.

  Next, the file management unit 21 proceeds to step SP12, and among the allocation extent signals S6A to S6C corresponding to the file to be the rear part after the combination, the AE corresponding to the first recorded extent extent signal S6A. Record 27 is detected.

  Subsequently, the file management unit 21 proceeds to step SP13, and changes the pointer stored in the AE record 27 detected in step SP11 described above to a pointer indicating the position of the AE record 27 detected in step SP12 described above.

  Next, the file management unit 21 proceeds to step SP14, and the attribute information such as the file name and file data length stored in the file record 25 corresponding to the file which is the previous part after the combination is obtained as a new file obtained after the combination. Change to attribute information corresponding to.

  Then, in the subsequent step SP15, the file management unit 21 deletes the file record 25 corresponding to the file that becomes the latter part after the combination from the file management table 26, and then proceeds to step SP16 to end the combination processing procedure RT2.

(3) Operation and Effect In the above configuration, in this video disk recorder 10, the file management unit 21 sets the recording start position and recording end position of the recording signal S6 to be recorded in the unit of byte of sector (that is, the start sector address) in the recording mode. (K ₁ , start byte offset value O ₁ , end sector address K ₂ and end byte offset value O ₂ ) are designated as files, and are recorded on the optical disk 22.

In addition to this, the file management unit 21 stores attribute information and pointers corresponding to the recorded recording signal S6 in the file management table 26 recorded in the optical disk 22, and is recorded in the optical disk 22. The recording start position and recording end position specified when recording the recording signal S6 in the AE table 28 specified by the pointer of the file management table 26 are set as the sector and the byte unit of this sector (that is, the start sector address K _1). , A start byte offset value O ₁ , an end sector address K _2, and an end byte offset value O ₂ ), and the file of this recording signal S 6 is managed.

In the video disk recorder 10, the file management unit 21 sequentially reproduces the file reproduction table 26 and the AE table 28 of the optical disk 22 in the reproduction mode, so that the recording start position and the recording corresponding to the file requested for reproduction are recorded. The end position is detected in units of bytes of the sector (that is, the start sector address K ₁ , start byte offset value O ₁ , end sector address K ₂ and end byte offset value O ₂ ), and based on the detection result, the optical disk is detected. The recording signal S6 corresponding to the file requested for reproduction is reproduced from 22.

  In this manner, in the video disk recorder 10, the file management unit 21 can designate the recording signal S6 for the optical disk 22 with the recording start position, the reproduction start position, etc., in the same sector or in different sector bytes. .

  Therefore, in this video disk recorder 10, it is not necessary to record the recording signal S6 on the optical disk 22 so that the head position of the recording signal S6 coincides with the head position of the sector unlike the system file of the conventional video disk recorder. For example, when the recording signal S6 is recorded at a high density with a relatively large sector size, even if the recording signal S6 having a relatively short file length is recorded in this sector, the area that remains without being recorded at that time Thus, the recording signal S6 can be newly recorded, so that the sector can be used effectively during recording. Thus, the recording signal S6 can be recorded at a significantly high density.

  In addition, since the file management unit 21 can designate the byte of the sector as described above, it is possible to designate an arbitrary position of the recording signal S6 even in an editing process in which the filed recording signal S6 is divided or combined at an arbitrary position. Thus, the file management table 26 and the AE recorded on the optical disk 22 can be stored in the editing process without newly recording the recording signal S6 for division or combination and recording it again on the optical disk 22. Editing processing can be performed simply by rewriting the contents of the table 28.

  According to the above configuration, the file management unit 21 makes the recording signal S6 into a file by specifying the recording position (that is, the recording start position and the recording end position) in units of bytes of the sector. Even in an editing process in which the recording signal S6 is divided or combined at an arbitrary position, the file management table 26 recorded on the optical disk 22 is newly recorded in the optical disk 22 without re-processing the portion to be processed of the recording signal S6. And the editing process can be performed only by rewriting the contents of the AE table 28, and thus the editing process can be greatly simplified.

(4) Other Embodiments In the above-described embodiment, the case where the present invention is applied to the video disk recorder 10 has been described. However, the present invention is not limited to this, and a hard disk, a magneto-optical disk, and the like. If a desired signal needs to be filed on a recording medium having a recording surface composed of a plurality of sectors, such as a magnetic disk, and recorded / reproduced, various other recordings can be performed. The present invention can be applied to a reproduction apparatus, a file management apparatus and a file management method for the recording and / or reproduction apparatus.

Also in the embodiment described above has dealt with the case of storing the address information such as the start sector address K ₁ corresponding to allocating Chillon extents signals S6A~S6C each AE record 27 of the AE table 28 or the like The present invention is not limited to this. When the recording signal S6 is continuously recorded over a plurality of consecutive sectors in the optical disk 22, at least one AE designated by the pointer of the file record 25 is used. in the recording signal S6 to record 27 may be stored the address information such as start sector address K ₁ corresponding.

  Further, in the above-described embodiment, in the division processing procedure RT1 (FIG. 4), one of the allocation extent signals S6A to S6C constituting the file is divided when dividing the file to be divided. Although the case where the extent signals S6A to S6C are divided from a predetermined position has been described, the present invention is not limited to this, and the recording signal S6 is continuously recorded over a plurality of consecutive sectors in the optical disk 22. In this case, the recording signal S6 may be divided at a predetermined position.

  Furthermore, in the above-described embodiment, the case where only two files are combined in the combination processing procedure RT1 (FIG. 5) has been described. However, the present invention is not limited to this, and one or a plurality of files are configured. A predetermined portion of the signal to be processed may be combined.

  Further, in the above-described embodiment, the case where the file management unit 21 is applied as the file forming means for specifying the recording position of the signal in the recording medium in a predetermined unit smaller than the sector and making the file has been described. However, the present invention is not limited to this, and the point is that, if the recording position of the signal in the recording medium can be designated by a predetermined unit such as a byte or a bit smaller than the sector and filed, other various types can be used. Can be applied.

  The present invention can be used for a file management apparatus such as a video disk recorder.

It is a block diagram which shows one Embodiment of the structure of the video disk recorder by this invention. It is a rough-line conceptual diagram with which it uses for description of file management information. It is a basic-line conceptual diagram which shows the address information storage part of AE record. It is a flow chart showing a file division processing procedure. It is a flowchart which shows the joint process procedure of a file. It is a basic diagram conceptual diagram which shows the general structure of an optical disc. FIG. 3 is a schematic conceptual diagram for explaining signal recording on an optical disk.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Video disk recorder, 12 ... System control part, 21 ... File management part, 22 ... Optical disk, 25 ... File record, 25A ... Attribute information storage part, 25B, 27B ... Pointer storage part, 26... File management table, 27... AE record, 27 A... Address information storage section, 28... AE table, S 1, S 11... Video signal, S 2, S 12. ~ S6C ... Allocation extent signal.

Claims (2)

The file management information recorded on the recording medium is composed of a file management table made up of a plurality of file records and an allocation extent table made up of a plurality of allocation extent records. An attribute information storage unit for storing the attribute information of the corresponding allocation extent record in the allocation extent table, and a pointer storage unit for storing a pointer of the corresponding allocation extent record in the allocation extent table. A start sector address indicating the address of the recording start sector as a recording position in the recording medium of a plurality of allocation extent signals divided from the recording signal, and the allocation extension actually from the head in the recording start sector. The recording of the allocation extent signal is actually completed from the beginning in the recording end sector, and the start byte offset value indicating the position to start recording the recording signal, the end sector address indicating the address of the recording end sector An address information storage unit that stores an end byte offset value that represents a position, and a pointer storage unit that stores a pointer of another corresponding allocation extent record, and includes a plurality of sectors of the recording medium. A file management device for filing a recording signal composed of a plurality of allocation extent signals to be recorded in a recording area and managing based on the file management information,
When the recording signal is divided into a plurality of allocation extent signals and recorded on the recording medium, the recording position in the recording medium for each of the allocation extent signals divided from the recording signal is set in the sector. The recording signal is filed by designating in arbitrary byte units, and the recording position is stored in the allocation extent table recorded on the recording medium,
At the time of dividing the file of the recording signal, the allocation extent record of the allocation extent signal to be divided is retrieved from the allocation extent table, and the allocation extent signal to be divided is divided. Find the start sector address and start byte offset value corresponding to the part after the position,
A new allocation extent record is created in the allocation extent table, and the start sector address and the start corresponding to the portion after the division position are stored in the address information storage section of the new allocation extent record. A byte offset value is stored, and the end sector address and the end byte offset value stored in the searched allocation extent record are copied and stored.
A new end sector corresponding to the previous part from the division position of the allocation extent signal to be divided into the end sector address and the end byte offset value stored in the searched allocation extent record. Change to the address and end byte offset value, and change the pointer of the searched allocation extent record to end information,
The attribute information stored in the file record corresponding to the file of the recording signal to be divided is converted, and a new file record is created corresponding to the new allocation extent record. A file management apparatus comprising: editing processing means for storing file attribute information of a recording target for a file record, and specifying file file division processing in bytes. The file management information recorded on the recording medium is composed of a file management table made up of a plurality of file records and an allocation extent table made up of a plurality of allocation extent records. An attribute information storage unit for storing the attribute information of the corresponding allocation extent record in the allocation extent table, and a pointer storage unit for storing a pointer of the corresponding allocation extent record in the allocation extent table. A start sector address indicating the address of a recording start sector as a recording position in the recording medium of a plurality of allocation extent signals divided from the recording signal, and the allocation extension actually from the head in the recording start sector. The recording of the allocation extent signal is actually completed from the beginning in the recording end sector, and the start byte offset value indicating the position to start recording the recording signal, the end sector address indicating the address of the recording end sector An address information storage unit that stores an end byte offset value that represents a position, and a pointer storage unit that stores a pointer of another corresponding allocation extent record, and includes a plurality of sectors of the recording medium. A file management method for filing a recording signal composed of a plurality of allocation extent signals to be recorded in a recording area and managing based on the file management information,
When the recording signal is divided into a plurality of allocation extent signals and recorded on the recording medium, the recording position in the recording medium for each of the allocation extent signals divided from the recording signal is set in the sector. The recording signal is filed by designating in arbitrary byte units, and the recording position is stored in the allocation extent table recorded on the recording medium,
At the time of dividing the file of the recording signal, the allocation extent record of the allocation extent signal to be divided is retrieved from the allocation extent table, and the allocation extent signal to be divided is divided. Find the start sector address and start byte offset value corresponding to the part after the position,
A new allocation extent record is created in the allocation extent table, and the start sector address and the start corresponding to the portion after the division position are stored in the address information storage section of the new allocation extent record. A byte offset value is stored, and the end sector address and the end byte offset value stored in the searched allocation extent record are copied and stored.
A new end sector corresponding to the previous part from the division position of the allocation extent signal to be divided into the end sector address and the end byte offset value stored in the searched allocation extent record. Change to the address and end byte offset value, and change the pointer of the searched allocation extent record to end information,
The attribute information stored in the file record corresponding to the file of the recording signal to be divided is converted, and a new file record is created in correspondence with the new allocation extent record. A file management method, wherein attribute information of a file to be divided is stored in a file record, and file division processing of the recording signal is specified in units of bytes.

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